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Volume 18
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10.3390/ma18030604
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Hierarchical CoMn-LDH and Heterostructured Composites for Advanced Supercapacitors and Electrocatalysis Applications

by
Ganesh T. Chavan
1,
Deepak P. Dubal
2,
Pritam J. Morankar
3,
Chan-Wook Jeon
3,
Jinsung An
1 and
Ki-Han Song
4,*
1
Department of Civil & Environmental Engineering, Hanyang University ERICA, Ansan 15588, Republic of Korea
2
Centre for Materials Science, School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisben, QLD 4000, Australia
3
School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan 38541, Republic of Korea
4
Department of Civil Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
*
Author to whom correspondence should be addressed.
Materials 2025, 18(3), 604; https://doi.org/10.3390/ma18030604
Submission received: 9 October 2024 / Revised: 8 January 2025 / Accepted: 25 January 2025 / Published: 28 January 2025
Versions Notes

Abstract

In the present study, self-assembled hierarchical CoMn-LDH, CoMn@CuZnS, and CoMn@CuZnFeS heterostructured composites were synthesized for bifunctional applications. As an electrode for a supercapacitor, CoMn-LDH demonstrated superior areal and specific capacitance of 5.323 F cm−2 (279.49 mAh/g) at 4 mA cm−2, comparable to or even higher than other LDHs. The assembled AC//CoMn-LDH hybrid supercapacitor device further demonstrated better stability with 63% original capacitance over 20,000 cycles. Later, as a catalyst, CoMn-LDH, CoMn@CuZnS, and CoMn@CuZnFeS electrodes revealed better performance, with overpotentials of 340, 350, and 366 and −199, −215, and −222 mV to attain 10 mA cm−2 of current density for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), respectively. Moreover, for CoMn-LDH, small Tafel slopes of 102 and 128 mV/dec were noticed for OER and HER with good stability compared to heterostructured electrodes.
Keywords: bifunctional electrode; hydride supercapacitor device; cyclic stability; overpotential; Tafel slope bifunctional electrode; hydride supercapacitor device; cyclic stability; overpotential; Tafel slope

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MDPI and ACS Style

Chavan, G.T.; Dubal, D.P.; Morankar, P.J.; Jeon, C.-W.; An, J.; Song, K.-H. Hierarchical CoMn-LDH and Heterostructured Composites for Advanced Supercapacitors and Electrocatalysis Applications. Materials 2025, 18, 604. https://doi.org/10.3390/ma18030604

AMA Style

Chavan GT, Dubal DP, Morankar PJ, Jeon C-W, An J, Song K-H. Hierarchical CoMn-LDH and Heterostructured Composites for Advanced Supercapacitors and Electrocatalysis Applications. Materials. 2025; 18(3):604. https://doi.org/10.3390/ma18030604

Chicago/Turabian Style

Chavan, Ganesh T., Deepak P. Dubal, Pritam J. Morankar, Chan-Wook Jeon, Jinsung An, and Ki-Han Song. 2025. "Hierarchical CoMn-LDH and Heterostructured Composites for Advanced Supercapacitors and Electrocatalysis Applications" Materials 18, no. 3: 604. https://doi.org/10.3390/ma18030604

APA Style

Chavan, G. T., Dubal, D. P., Morankar, P. J., Jeon, C.-W., An, J., & Song, K.-H. (2025). Hierarchical CoMn-LDH and Heterostructured Composites for Advanced Supercapacitors and Electrocatalysis Applications. Materials, 18(3), 604. https://doi.org/10.3390/ma18030604

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